What is the SMCL for Iron and for Manganese?

The Secondary Maximum Contaminant Level (SMCL) is a guideline set by the Environmental Protection Agency (EPA) for certain contaminants in drinking water that may cause aesthetic issues such as taste, odor, or color, but do not pose a direct health risk at the levels established. For iron, the SMCL is established at 0.3 mg/L. This level helps to minimize issues like staining of laundry and plumbing fixtures, as well as any metallic taste in water. For manganese, the SMCL is 0.05 mg/L. Manganese can also cause similar aesthetic concerns and is included to prevent issues related to taste and staining.

Understanding these SMCL values is crucial for water operators, as it aids them in ensuring water quality remains acceptable for consumers while complying with health guidelines.